Photographic-plate holder.



P. K. STERN. PHOTOGRAPHIC vPLATE HOLDER. APPMGATION MLM) APRA, 191-3.

Patented Feb. 9, 1915.

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INVENTOR www WITNE88E8 P. K. STERN. PHOTOGRAPHIG PLATE HOLDER.

APPLIGATION FILED APR. 1, 1913.

1,127,539. Patented Feb.9,1915.

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WITNE88E8 IN VE N TOR @Q45 @www THE NDRRIS PETERS CU.. PHOTC-LITHO..WASHINGTON, DA C.

provide at the UNTTED STATES PATENT OFFICE.

PEILIP K. STERN, 0F NEW YORK, N. Y.; ELIZABETH L. STERN EXECUTRIX OFSAID PHILIP K. STERN, DECEASED.

PHOTOGRAPI-IIC-PLATE HOLDER.

Appication led April 1, 1913.

T0 all whom it may concern Be it known that I. PHILIP K. STERN, acitizen of the United States, residing in the city, county, and State ofNew York, have invented certain new and useful Improvements inPhotographic-Plate Holders, of which the following is a specification.

My invention in photographic plate holders relates to that type known aspermutation plate holders, and more particularly in this connection, torevolving plate holders, whereby upon the rotation thereof, a series ofconsecutive exposures of the involved sensitiZed photographic materialmay be made.

The principal feature of my invention lies, in its application tophotographic hand cameras, adapted to the use of dry plates, since itpermits of the taking of consecutive pictures upon a plate with as greatfacility as those taken upon roll-film. It moreover possesses equalopportunity for daylight loading.

rThe object of my invention is to provide a simple and inexpensive plateholder, applicable to photographic cameras, whereby dry plates may beemployed to an advantage equal to that of r ll-iilm, and moreover, tosame time, a light-proof plate package, which may be utilized for theadditional purpose of a light-tight developing vessel within which theplate may be treated,

in the process of development and fixation.

A further object of my invention, is to establish a system oflight-proof plate containers, which may be of sufficiently inexpensiveconstruction to be discarded after once used.

The features characteristic of my invention whereby l attain theseobjects, are fully set forth in the accompanying specification anddrawing, forming part thereof, and the distinct features of novelty arereferred to in the claims at the conclusion of the specification.

lV ith reference to the drawings Figure l is a front elevational view ofmy improved plate holder, of substantially full pocketsize, showing afragment of the center bearing of the shutter as being removed. Fig. 2is an enlarged rear elevational view thereof, with a portion of thecover broken away, together with a corresponding part of the perimeter.Fig. 3 is a side elevational view Specification of Letters Patent.

Patented Feb. 9, 1915. serial No. 758,253.

thereof, with a section of the end nearest the observer removed, and inaddition, illustrating the connection between the photographic cameraand the plate holder aperture. Fig. l is a fragn'ientary, sideelevational view of a portion of the side of the plate holder, taken onthe lines l-l of Fig. 3. Fig 5 is a fragmentary plan detailed view of aplate spring and catch, shown in Fig. fi, in accordance with myinvention. Fig. 6 is a fragmentary, enlarged detailed view of a sectionof the center bearing members, taken on the line G of Fig. l, and Fig. 7is a front elevational view of a photographic plate, illustrating thepicture divisions as effected by the index of the holder.

In the several figures, similar character of reference indicate like orthe same parts throughout where they occur, wherein,

l designates the plate holder cover, which is construced preferably oflight sheet metal, and is drawn, stamped or otherwise formed, to providea neck 2, and an annular projecting flange 3.

Slidingly fitting the plate holder cover l, in telescopic relation,within the necl 2, is a body el. This is formed in a similar manner tothat of the cover l, and is provided with a corresponding annularabutment rim 5, which receives the thrust of the free end of the neck 2.Formed integral with the body 4 and rim 5, is an open window frame 6.This frame has a concentrically formed circular sash 7, which is turnedinwardly and bent to form a flanged rim 8. liifithin the sash 7 andfitted for rotation is a revolving shutter 9, provided with a window 10.The shutter 9 is flanged over on the edge to correspond with the rim S,and is again fianged outwardly at the free edge to form an annularlyprojecting abutment ll. The window 10 is flanged inwardly to provide aneck 12, the free projecting terminal of which is reinforced byturningit over substantially at right angles, to form a stiffening frame13.

`Within the body 4, and fitted thereto in telescopic relation, is aninner body 14. This is provided with an integral secondary window sash15, and a secondar,7 rim l5. of substantially the same formation as thatof the sash 7 and rim 8.

'Sheared and bent down from the secondary sash 15 are a series ofalternately disposed legs 17, which bear against the inner surface ofthe window frame 6. rThese are of sufficient length to space the frames6 and 15 at the desired distance apart to provide for the free rotationof the shutter 9 within the sash 7, as will be more fully explained.l/Vithin the secondary rim 16 is an inner or secondary shutter 18,mounted in a similar manner `therein to that of the shutter 9 within therim 8, and is provided with a window 19.

rlelescopically engaged with the inner body 111, is an inner wall orlining 21. This is provided with a bottom 'frame 22, which has opensecondary rims 8 and 16 respectively. rThe bottom frame 22 bears lightlyagainst the rim 16 of the secondary shutter 1S, and the secondary windowsash 15 bears lightly against the abutment 11 of the rim 3, therebysecuring suilicient lrictional engagement, to obviate the rotation ofeither of the shutters 9 or 18 by slight jars or vibration, while at thesame time, the abutments 11 of either of the shutters 9 or 18 willrestrict the outward displacement and maintain the position of saidshutters within their respective sashes and frames. The

'bcttom frame 22 is moreover sheared out and bent down at intervals toprovide supporting legs 24, which bear against the inner surface of thesecondary window sash 15 and eiects the spacing of the inner wall orlining 21.

Spaced at four points around the window sash 23, at equal distances fromeach other, are studs or stops 25. These are pressed inwardly from theouter tace of the bottom frame 22, and project to form a support, forthe involved photographic dry plate, designated 26, and position it inthe focal plane of the holder.

The wall or lining 21, has sheared out plate-positioning springs 27.These are, in the instance illustrated, four in number, and arepositioned at, substantially, equal distances apart and intermediatelywith respect to the inner wall or lining` 21. '1 hese springs areprovided with terminal integrally formed lugs 28, which are bent orfolded from the edge of the springs 27, after the same have been blankedin the process of manufacture. The function of these lugs, is to overlapthe edge of the dry plate 26 when positioned within the holder, and tobear the same down against the studs 25 in securing the position of theplate 26 in the 'focal plane of the holder.

integral with, and projecting from the free ends ot the respectivesprings 27 are terminal tails 29, and integrally formed from the innerwall 21, are bent lugs 30. rThese are turned over inwardly, to providecatches. with which to engage and withhold, the terminal tails 29, andthereby maintain their respective springs 27, temporarily against theinner body 14, and away from the dry plate 26, during the operation oiloading the plate holder.

rlllhe springs 27, are blanked and sheared in a manner, as to fornisemi-elliptic spring leaves 31. These are bowed inwardly, in order thatthe requisite attention may be given them, when they are positionedagainst the plate 26, to aord sufficient resisting pressure theretoagainst displacement. rThey are also sprung downwardly, or in adirection toward the bottom frame 22, suiiiciently, to force the dryplate 26 firmly against the focal plane studs 25, to insure therequisite engagement therewith.

The inner body 14, together with the lin ing 21, is held in positionwithin the body e, by an integral flange 32, which is turned over lonall four sides and brought to bear rmly down upon and over the free edgeof the inner body 14, as well as, upon and over the corresponding edgeof the inner wall 21.

The shutter 9 and secondary shutter 18,

are each provided with a center bearing, i

which mutually engage each other, and consist respectively, ot` apressed boss 33, projecting inwardly, from the inner surface of theshutter 9, and a corresponding socket 34 pressed inwardly from the innersurface of the secondary shutter 18. The said boss and socket, tit eachother ttor free rotation.

The shutter 9 engages the secondary shutter 18, in driving relation,through an annularly disposed inwardly depressed rib 35, engaging in acorresponding annular socket 36, formed in the secondary shutter 1S.rThe rib 35 is disposed in crescent formation, and is positionedsubstantially opposite the window 10, and occupies one half of thecircumference of the socket 36, with which it is engaged, in couplingrelation. rThe annular path of the socket 36 is interrupted by anabutment 37, which is positioned in a line radial from the centerbearing socket 34C and parallel with the adjacent edge of the window 19.The relation of the rib 35 and abutment 37 is such, that upon rotatingthe shutter 9, in the direction of the indicating arrow pointing to theword 0th in` Fig. 1, the end of the rib 35 opposite to said arrow, willbe brought into contact with the abutment 37, and upon continuing themovement of the shutter 9, the secondary shutter 1S will be driven andcarried around in the same direction. Upon imparting a reverse movement,to the shutter 9 however, and continuing the said movement for onehalfof a revolution, the contacting end of the rib 35 shall have becomedisengaged from the abutment 37, and the opposite end of the said rib,or that end adiacent to the arrow indicating the word, Gm will bebrought into contact with the opposite 'tace of the abutment 37, when itwill be observed the shutter 9 has alone been moved, while the shutter18 has remained stationary. This reverse movement for one-half of arevolution, of the shutter 9 brings the windows 10 and 19 into aposition of register, and thus opens the plate holder, for the passageof light, to the dry plate 26, when the making of an exposure may beeffected.

Upon continuing the rotation of theshutter 9 to e'iect the reguisitevmovement for the spacinv of a second consecutive exposure, the engagingend of the rib 35 with the abutment 37, shall have carried with it thesecondary shutter 1S, while the windows 10 and 19 have been in register.At equal intervals around the sash 7, is an index, arranged in themanner of a dial, consisting in the instance illustrated, of six equaldivisions, accompanied by the numerals 1, 2, 8, 4r, 5, 6, and radialindicating pointers, together with a Zero character intermediatelysituated with respect to the numerals 5 and 6, and consisting of acrossed horizontal and vertical line. On the shutter 9, is a radiallydisposed pointer 3S intermediately branched from two oppositelydirecting, annularly disposed ro tation pointers 39 and 410respectively. The pointer S9 is directed to the word Orf, and 40, to theword On. The pointer 38 provides an index register for dividing theinvolved dry plate 26, as directed by the indices, into six equalexposure divisions and for bringing the windows 10 and 19 into theposition of registration and conversely, for bringing the said windowsinto a cutoli position, when the holder is detached from the camera, orwhen it is required that the same should be made light-tight.

In the position illustrated in Fig. 1, which indicates the windows 10and 19 in a position, diametrically opposite each other, the plateholder will be light-tight.

Notwithstanding the fact that the shut ters 9 and 1S do not lie incontact with each other suiiiciently close to eliect a light seal, alight seal, however is effected between them, and any light entering thewindow 10 is cut oli" from passing between the shutters 9 and 1S andgaining access to the plate holder through the window 19, by theinterposition of the crescent rib and engaged socket 36. 1t will be thusunderstood that any oblique or other rays directed between the shutters9 and 18 toward the window 19, will be eclipsed by the axis coupling,comprising the rib 35 and socket 36, since these members are of adiameter greater than the width of the windows 10 or 19, taken in aplane coincident with the plane of these windows. Oppositely situatedwith respect to the rib 35, upon the shutter 9, and parallel with theadjacent edge of the window 10, is a transverse rib 41. rThis isprovided for the reception of a positioning projection of a photographiccamera, designated A, with which my improved plate holder is engaged.Below the rib 35, upon the shutter 9, is an inwardly depressed rib 42adapted to receive the lower end portion of a positioning rod 13 securedat its upper end to the camera fr A light-tight connection between thecamera A, and the plate holder, at the window 10, is secured by a rabbetR telescopically engaged with the neck 12, and the camera A is securedto my improved plate holder by a catch-hook C and a release catch DAfter the plate holder has been positioned on the camera A, and it isdesired to make preparations for the lirst exposure, and assuming thepointer 38 to be at the zero mark, it will be necessary to rotate theplate holder in the direction as indicated by the a-rrow for one-half ofa revolution. This will bring the windows 10 and 19 into registrationwith each other.

Upon continuing the rotation, and observing the pointer 38 as it passesthe numerals 3, -l, 5 and 5, until it arrives at the leader of thenumeral 1, the holder will be in position for making the lirst exposureupon the dry plate and upon further continuing the movement of theholder, in order to bring the pointer 38 to the leader of the numeral 2,and consecutively of the numerals 4, 5 and G, the relation of theregistered windows 10 and 19, with respect to the dry plate 26 shallhave been such. as to divide the latter into six equal exposuresub-divisions, as depicted in the illustration Fig. 7.

Then it is desired to detach the plate holder from the camera, the sameshould first be made light-tight by rotating the same in the directionindicating Off. This is effected by reversing the direction of rotation,as indicated bythe pointer 39,

until the pointer 38 arrives at the Zero mark` r when the windows 10 and19 shall have been positioned diametrically opposite each other, andinto that which they assumed prior to making the exposure positionsreferred to, after which, the plate holder may be removed from thecamera, when it will again assume the condition of alight-tightphotographic package.

It is the purpose of my invention to provide these plate holders, loadedwith photographic dry plates and placed upon the market as a newphotographic supply, in which instance, the plates are loaded in theholder in the operation ot packing in the factory. In any event,however, the loading or reloading of the holder is effected by firstprying ott the cover 1 from the body el, and setting the springs 27 backagainst the inner body 1aand temporarily latching them by the bent lugs30 and tails roo sle-

29, as indicated in the illustration Fig. 5, after which, a plate, film,or film and support, is laid down upon the studs 25, whereupon, thesprings 27 are positioned in successive order respectively on andagainst the sensitized photographic material or the support therefor,after they have been released from their restraining lugs 30.

The operation is expedited by bringing the opposite lugs of one of thesprings 27, first into contact with the plate or film support. 'l hiswill force it down on to the studs 25, as well as, thrust it laterallytoward the opposite side of the holder. Upon forcing the plate backagainst the action of' the spring, sufficiently, to provide thenecessary space between the edge of the plate and the inner frame, toaccommodate the thickness of the spring and the fingers of the operator,a second holding and positioning spring` 27 is snapped on to theopposite edge of the plate and thus the latter will be clamped betweentwo diametrically oppositely disposed tension springs 27, and will besufficiently secured by the downward pressure ot the springs, tomaintain it in contact with the studs Q5.

Owing to the limited amount of margin between the perimeter of thepicture circle, and the edge of the dry plate, it is necessary toposition the plate Q6 centrally within the holder. To accomplish thispurpose, l have introduced two pairs of four, of these plate holdingland positioning springs. arranged in quadrature, whereby a pair of-lateral springs are similarly positioned and snapped on to the plate26, 'when the latter will be held effectively by four springs tending tobring the position of the plate into that oi' centralization withrespectto the holder, and thus, a uni'for n margin around the picture circleand the edge of the dry plate is aflorded. Aediter the plate 26 'hasbeen engagel by the four holding and positioning springs 27, and theshutters 9 and 18 are in light-tight relation, and as indicated in Fig.l, the cover l is forced down over the body 4.-, until the edge of' theneck 2 abuts with the shoulder 5. In this condition, the holder may beexposed to the most actinic light without impairinp the involved plate.

It will be understood that a plate package, comprising my improvedholder and involved dry plate presents a compact form and protects theinvolved plate effectively against the attacks of moisture, and therebysecures certain advantages in transportation, and distribution.

lt will be observed that the shutter 9 protrudes slightly beyond theplane of the window trame 6: the purpose of which is to provide alimited amount or" clearance 'for the photographic camera A, when theholder is being rotated.

' Owing to the 'frictional engagement of the abutment 11 with thesecondary window sash 15, accidental rotation of' the shutter 9, whichmight be occasioned by a jar or other disturbance, is obviated, andmoreover, due

to the frictional engagement of the secondary rim 16, with the bottomframe 2Q, the secondary shutter 1S is restrained against such rotation,until positive engagement between either end of. the rib 35 and theabutment 37 has been effected. lt will be thus understood thataccidental displacement of either of the shutters 9 or 1S issubstantially obviated.

It will be observed by the foregoing description of my invention thatthe novel plate holder presented provides a simple and inexpensiveconstruction, whereby a plurality of consecutive exposures may beeffected on a commercial dry plate, with the greatest of facility andease in manipulation, and provides, at the same time, a new article ofmanufacture in the photographic industry, whereby a light-proofl packagefor plate exposures is presented. will be understood, that the-entireholder containing the plate may be employed as a daylight developingtank by merely immersing the holder, 'together with its contents into asuitable developing box. By plunging the holder containing the plateedgewise down the liquid developing solution will enter the interior oithe holder through the window 1,0 and force the imprisoned air ahead otlit, until it finds its escape through the window 19 and between theshutters 9 and 18. Meanwhile the liquid developing solution will riseand reach the edge ot the window Ji9 adjacent to the window l0 and floodthe interior of the plate holder to that level, whereupon, it willcontinue to rise until the entire plate has been flooded in suchsolution.

After the developing process, the holder. together with the plate, isremoved and similarly plunged into a box containing water, and finallytransferred and plunged into a similar box containing the fixingsolution. Thus it will be understood that the plate holder not onlypresents novel features as a plate holder, but in addition, provides thenecessary qualifications for a daylight developing tank. including thesprings .27 may be struck up in a suitable punch press by punches anddies Jfrom light sheet metal, an inexpensive construction is providedwhich may be purchased at a sufhciently low figure, to warrant thethrowingl of the holder away, after the contained plate has beendeveloped and fixed, and

HavinnV Jfully described my invention1 l claim as new and desirf tosecure by Letters Patent of the United States:

Moreover, it f i into a flat developing box,

Since the entire holder,

l. in a photographic plate holder, a body portion an( covertelescopically engaged therewith, the body portion being provided with aplurality of annularly disposed inwardly acting plate positioning andholding springs formed integral with the body portion.

ln a rotatory plate holder, a pair of rotatory mutually engagingsuperimposed shutter disks, each being provided with an open window, andmutually over-lapping light cut-offs forming a portion of said disks.

8. ln a rotatory photographic plate holder, a pair of rotary shutterdisks, each .provided with a normally open window, and a coveringportion, and a. lateral light cut-off between the windows.

4. ln a rotatory plate holder, a body portion, an inner lining therefor,a pair of ro` tatory shutter disks carried by the body and liningrespectively, windows in each of the shutter disks, adapted to registerWith each other, an axis coupling member on each in mutual engagement, alateral light cut-oli1 member on each, and plate positioning and holdingsprings, carried by the lining, and a cover for the whole.

5. ln a photographic plate holder, an outer casing, of substantiallyrectangular formation, and having a circular aperture therein, arotatory shutter, carried within the aperture, a second casing withinthe first, having a corresponding circular aperture and a shuttercarried thereby, an axis coupling on each in mutual engagement, and indriving relation, an inner casing provided with a plurality of platepositioning springs, adapted for inward and outward action, and a coverfor the whole.

6. ln a photographic plate holder, the combination with the body, of apair of superimposed rotatory shutters, each being provided with awindow, and a covering portion, and mutually engaging axis couplingmembers, an index upon the casing, and an indicator upon one of theshutters, adapted to register with the index, of an inner frame,provided with a plurality of plate holding and positioning springs, andof a cover for the whole.

7. ln a photographic plate holder, a rectangularly formed body portion,provided with a marginal abutment rib, a cover telescopicallv engaged tothe body portion, provided with a corre gonding rib, a similarly formedinner body, provided with an integral end, having a circularperforation, there being a corresponding perforation in the bodvportion, a rotatory shutter in each, an axis coupling for the shutter, alining within the inner body, having an integral bottom frame, focalplane stops, formed from the bottom frame and projecting within theholder, springs disposed around the lining,

and formed integra therewith, adapted to position an(w hold il withinthe holder., against said focal pli stops, together' with a centerbearing member in each of the said shutters.

8. ln a photographic plate holder, an outer frame and an inner frame,each having a. circular aperture, a rotary shutter, provided wii avindow in each of the apertures, an ama coupling and light shieldbetween the shutters, one of said shutters adapted to drive the othertherethrough, an inner frame provided with focal plane studs, andintegral marginal plate holding and ositioning springs, and spring-withholding catch members respectively on the body and springs, adapted towithhold the latter in a disengaging position.

9. ln a photographic plate holder. the combination with the body ofplurality of marginal plate holding and positioning springs, formedintegralwith the body, and of spring withholding` catch members on thebody, adapted to engage and withhold the springs in a disengagingposition.

l0. ln a permutation photographic plate holder. outer casing, a dualrotary shutter, provided with a window, an axis coupling and a drivingmember carried thereby, and forming a portion of said dual shutter,together with annular frictional restraining flanges and lightabutments, and internal plate holding and positioning springs arrangedwithin said outer casing.

ll. ln a revolving plate holder, a rectangularly formed frame, providedwith a dual rotarv shutter, having mutually' registering windows andlight cut-ods therebetween, and a plurality of plate holding andpositioning springs formed integrally with the rectangular frame.

12. A permutable photographic plate holder, comprising a rotatoryrectangular box, having an inner and outer framework, and circularapertures in each of the frames, a circular shutter disk in each of theapertures, provided with mutually registering windows and coveringportions therefor, and mutually engaging axis coupling members,together' with plate holding and positioning devices, and an index dialon the outer frame coacting with the outer shutter disk.

13. ln a photographic plate holder, an outer and inner frame, eachhaving a circular aperture, a rotatory shutter disk. provided with awindov7 mounted in each of the apertures, an axis coupling and lightshield between the shutter disks, comprising a driving rib and abutmentrespeetivelv; said disks adapted for engagement.` upon the rotation ofthe outer disk. during a partial revolution thereof' in eitherdirection, and adapted to drive the inner disk in either directionthrough the rotation of the outer of the said name to this specificationin the presence of two subscribing Witnesses.

PHILIP K. STERN.

disk upon a further increment rotation, substantially as described.

disk in either direction through the rotation of the outer disk upon ,efurther increment of the said rotation, substantially as de- TWitnesses:scribed. E. L. STERN, R. H. TUBBS.

In testimony whereof, I have signedv my of this patent may be obtainedfor five cents each, by addressing the Commissioner of Patents,

Washington, D. C.

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